// Copyright 2013 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef V8_PROFILER_HEAP_SNAPSHOT_GENERATOR_INL_H_
#define V8_PROFILER_HEAP_SNAPSHOT_GENERATOR_INL_H_

#include "src/profiler/heap-snapshot-generator.h"

#include "src/profiler/heap-profiler.h"
#include "src/string-hasher-inl.h"

namespace v8 {
namespace internal {

    HeapEntry* HeapGraphEdge::from() const
    {
        return &snapshot()->entries()[from_index()];
    }

    Isolate* HeapGraphEdge::isolate() const { return to_entry_->isolate(); }

    HeapSnapshot* HeapGraphEdge::snapshot() const
    {
        return to_entry_->snapshot();
    }

    int HeapEntry::set_children_index(int index)
    {
        // Note: children_count_ and children_end_index_ are parts of a union.
        int next_index = index + children_count_;
        children_end_index_ = index;
        return next_index;
    }

    void HeapEntry::add_child(HeapGraphEdge* edge)
    {
        snapshot_->children()[children_end_index_++] = edge;
    }

    HeapGraphEdge* HeapEntry::child(int i) { return children_begin()[i]; }

    std::vector<HeapGraphEdge*>::iterator HeapEntry::children_begin() const
    {
        return index_ == 0 ? snapshot_->children().begin()
                           : snapshot_->entries()[index_ - 1].children_end();
    }

    std::vector<HeapGraphEdge*>::iterator HeapEntry::children_end() const
    {
        DCHECK_GE(children_end_index_, 0);
        return snapshot_->children().begin() + children_end_index_;
    }

    int HeapEntry::children_count() const
    {
        return static_cast<int>(children_end() - children_begin());
    }

    Isolate* HeapEntry::isolate() const { return snapshot_->profiler()->isolate(); }

    uint32_t HeapSnapshotJSONSerializer::StringHash(const void* string)
    {
        const char* s = reinterpret_cast<const char*>(string);
        int len = static_cast<int>(strlen(s));
        return StringHasher::HashSequentialString(s, len,
            v8::internal::kZeroHashSeed);
    }

    int HeapSnapshotJSONSerializer::to_node_index(const HeapEntry* e)
    {
        return to_node_index(e->index());
    }

    int HeapSnapshotJSONSerializer::to_node_index(int entry_index)
    {
        return entry_index * kNodeFieldsCount;
    }

} // namespace internal
} // namespace v8

#endif // V8_PROFILER_HEAP_SNAPSHOT_GENERATOR_INL_H_
